Fortnite low fps with Low cpu, gpu and ram usage.

[driesmoortgat]

So i recently got into playing fortnite, but i seem to be having a problem. I get over 180 fps when playing in a normal area. Once i get into a city or look into it from ontop of a hill my fps drops to about 90. I know that its more demanding to render more objects, but the weird thing is that my cpu and gpu usage almost never go over 50% and neither does my ram. When i run a benchmark my gpu (1070) runs at 1998 mhz all the time but in fortnite it seems to be dropping itself to 1600 mhz occasionaly. My system is gtx 1070, 16gb ram 2883hmz, ryzen 5 1600 mhz 4,1 ghz.  

Does any of you know a cause or maybe even a fix for this problem? 

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[driesmoortgat]

yeah its single channel ram.